@article {644,
	title = {Partitioning the variation within the acid neutralizing capacity of surface waters in Scotland in relation to land cover, soil and atmospheric depositional factors},
	volume = {265},
	year = {2001},
	pages = {39-49},
	author = {Kernan, M. and Helliwel, R.}
}
@article {539,
	title = {Critical loads of sulphur and nitrogen for freshwaters in Great Britain and assessment of deposition reduction requirements with the First-order Acidity Balance (FAB) model},
	volume = {4},
	year = {2000},
	pages = {125-140},
	author = {Curtis, C. and Allott, T. and Hall, J. and Harriman, R. and Helliwel, R. and Hughes, M. and Kernan, M. and Reynolds, B. and Ullyett, J.}
}
